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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 440 · 40 questions
TalentJR

The trick (Split and double): Split the number into tens and ones: 37 = 30 + 7. Double each part (30 → 60, 7 → 14) — or halve each part. Add the two answers: 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.Double 38 =
  2. 2.Double 16 =
  3. 3.Double 36 =
  4. 4.Double 91 =
  5. 5.Double 32 =
  6. 6.Double 53 =
  7. 7.Half of 126 =
  8. 8.Double 52 =
  9. 9.Double 55 =
  10. 10.Double 12 =
  11. 11.Half of 148 =
  12. 12.Half of 164 =
  13. 13.Half of 16 =
  14. 14.Double 82 =
  15. 15.Half of 38 =
  16. 16.Double 31 =
  17. 17.Half of 24 =
  18. 18.Double 69 =
  19. 19.Double 63 =
  20. 20.Double 71 =
  21. 21.Double 61 =
  22. 22.Double 43 =
  23. 23.Half of 68 =
  24. 24.Half of 12 =
  25. 25.Half of 28 =
  26. 26.Double 18 =
  27. 27.Double 56 =
  28. 28.Half of 192 =
  29. 29.Half of 52 =
  30. 30.Double 78 =
  31. 31.Half of 96 =
  32. 32.Half of 162 =
  33. 33.Half of 42 =
  34. 34.Double 19 =
  35. 35.Half of 14 =
  36. 36.Half of 48 =
  37. 37.Half of 22 =
  38. 38.Double 54 =
  39. 39.Double 17 =
  40. 40.Half of 132 =

Answer key

  1. 76
  2. 32
  3. 72
  4. 182
  5. 64
  6. 106
  7. 63
  8. 104
  9. 110
  10. 24
  11. 74
  12. 82
  13. 8
  14. 164
  15. 19
  16. 62
  17. 12
  18. 138
  19. 126
  20. 142
  21. 122
  22. 86
  23. 34
  24. 6
  25. 14
  26. 36
  27. 112
  28. 96
  29. 26
  30. 156
  31. 48
  32. 81
  33. 21
  34. 38
  35. 7
  36. 24
  37. 11
  38. 108
  39. 34
  40. 66

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